I solved the problem by disabling "fastcgi_buffering" or increasing fastcgi_buffer_size. Before nginx uses default buffer size and it failed.
It seems irrelevant to ssi but ssi somehow trigger the error. But still I don't know why there was multiple empty response. Can anybody have any explanation about this?
It seems irrelevant to ssi but ssi somehow trigger the error. But still I don't know why there was multiple empty response. Can anybody have any explanation about this?